chore: revert auth json (#7026)
### Description
Given current staffing and the fact that the `auth.json` isn't a big
feature for the next minor release we want to get more testing to make
sure that all of our existing authentication strategies still work with
`auth.json`. At the moment `TURBO_TOKEN` isn't respected, this PR should
fix that.
```
[0 olszewski@chriss-mbp] /Users/olszewski/code/vercel/turborepo $ TURBO_TOKEN=*** turbo_dev build --filter=docs --remote-only --output-logs new-only
WARNING no caches are enabled
...
```
This is a revert of the following PRs
- #6880
- #6889
- #6927
which make up all of the usage of `auth.json`.
### Testing Instructions
Existing tests and 👀 making sure that I reverted everything correctly
Make sure that setting `TURBO_TOKEN` works as expected:
```
[0 olszewski@chriss-mbp] /Users/olszewski/code/vercel/turborepo $ turbo_dev info | head -n 3
You are not logged in
44 packages found in workspace
[0 olszewski@chriss-mbp] /Users/olszewski/code/vercel/turborepo $ TURBO_TOKEN=*** turbo_dev build --filter=docs --remote-only --output-logs new-only
• Packages in scope: docs
• Running build in 1 packages
• Remote caching enabled
@turbo/workspaces:build: cache hit (outputs already on disk), suppressing logs 01ead40ee62658af
docs:rss: cache hit, suppressing logs c569e716da69384d
docs:schema: cache hit, suppressing logs c7438141455c2a98
@turbo/gen:build: cache hit, suppressing logs e0ef70531aac79d7
docs:build: cache hit (outputs already on disk), suppressing logs 9e268e56e4cb8842
Tasks: 5 successful, 5 total
Cached: 5 cached, 5 total
Time: 1.01s >>> FULL TURBO
```
Closes TURBO-2061
